CMH
Columbus, Ohio
CMI
Champaign / Urbana, Illinois
CNF
Belo Horizonte, Brazil
COS
Colorado Springs, Colorado
COU
Columbia, Missouri
CRP
Corpus Christi, Texas
CUN
Cancún, Mexico
CUR
Curaçao, Dutch Caribbean Island
CUU
Chihuahua, Mexico
CVG
Cincinnati, Ohio
CWA
Wausau / Stevens Point, Wisconsin
CWB
Curitiba, Brazil
CZM
Cozumel, Mexico
DAY
Dayton, Ohio
DBQ
Dubuque, Iowa
DCA
Washington, D.C..
DEN
Denver, Colorado
DFW
Dallas / Fort Worth, Texas
DRO
Durango, Colorado
DSM
Des Moines, Iowa
DTW
Detroit, Michigan
DUB
Dublin, Ireland
DUS
Düsseldorf, Germany
EDI
Edinburg, Scotland